Instead of the transaction the SAP initial screen appears...

Hi all.

Does somebody know why sometimes when I call a transaction through an ITS server , just appears the initial screen of the SAP system?

For example:

I execute this transaction (IW29) through the SAP ITS server:

http://sapits1.esri.com/scripts/wgate/webgui/!?~transaction=IW29

but the result doesnt show me the transaction, just the initial screen of the SAP system 😔

I remember happened to me before but I dont remember what was the solution.

Thank you very much,

Jessica.